The first thing that came to mind as twin-like was a dual world with "light" and "dark" modes- which work quite well in SoM. I like the idea of two towers also, so I pictured two identical towers, one in the light world and one in the dark world, whose "existence" overlaps in their middle.
Also, the idea of seeing your "copy" in a mirror sounds intriguing. Seeing a non-mirrored copy of the player in a mirror-like dimensional window actually seems more interesting that just regular mirrors. Something like being able to talk to your own reflection which acts as an independent creature.
I wonder if you could make a convincing mirror effect for a room by making a regular window with a reversed copy of the room on the other side? If you made a short cutscene that introduced them as a mirrors that were also portals to the opposite tower it would go a long way to explaining what they were supposed to be.
I was born June 26th so I'm crabby as opposed to bi-polar
Also, the idea of seeing your "copy" in a mirror sounds intriguing. Seeing a non-mirrored copy of the player in a mirror-like dimensional window actually seems more interesting that just regular mirrors. Something like being able to talk to your own reflection which acts as an independent creature.
I wonder if you could make a convincing mirror effect for a room by making a regular window with a reversed copy of the room on the other side? If you made a short cutscene that introduced them as a mirrors that were also portals to the opposite tower it would go a long way to explaining what they were supposed to be.
I was born June 26th so I'm crabby as opposed to bi-polar